Automatic dispenser and storage device for sheet film

ABSTRACT

An automatic dispenser for sheet material includes a magazine having a plurality of carriers, each carrier being adapted to receive a cartridge-containing sheet material. The magazine further includes a lifting device for raising a selected carrier and its associated cartridge and means responsive to upward movement of a carrier for opening an access door on the associating cartridge to permit withdrawal of a sheet carried therein.

United States Patent [1113528340 [72] inventors Stephen J. Wenthe; [56]References Cited Charles F. Shule, both of Rochester, UNITED STATESPATENTS [21] Appl. No. 794,031 [22] Filed J. 27, 1969 3,150,263 9/1964Catlin 250/66 [45] Patented Dec. 21, I971 Primary Examiner-James C.Mitchell Attorneys-Robert W. Hampton and Milton S. Sales [54] AUTOMATICDISPENSER AND STORAGE DEVICE FOR SHEET FILM ABSTRACT: An automaticdispenser for sheet material in- 13 Chllns,9 Drawing Figs. cludes amagazine having a plurality of carriers, each carrier being adapted toreceive a cartridge-containing sheet materi- [52] U.S. Cl 312/35, al.The magazine further includes a lifting device for raising a 250/66, 3 l2/42, 206/1 A selected carrier and its associated cartridge and meansrespon- [51] Int. Cl A47f 4/00 sive to upward movement of a carrier foropening an access [50] Field of Search 312/35,42, door on theassociating cartridge to permit withdrawal of a 50, 60; 206/1 A; 220/29;221/126, 129; 250/65, 66 sheet carried therein.

rllitiwlill i PATENTED UEBZ? WI SHEET 2 OF 6 STEPHEN U. WENTHE CHARLESF. SHUTE INVENTORS ATTORNEYS STEPHEN d. WENTHE CHARLES F. SHUTEINVENTORS BY y/Q J/W man M ATTORNEYS PATENTEDBECZIBTI' 3628.840

SHEET Q 0F 6 PEG. Y

STEPHEN d. WENTHE CHARLES E. SHUTE INVENTORS BY W WW M

ATTORNEYS PATENTED "821 B7! SHEET .5 BF 6 FIG. 8

J. WENTHE F SHUTE INVENTORS STEPHEN CHARLES ATTORNEYS AUTOMATICDISPENSER AND STORAGE DEVICE FOR SHEET FILM CROSS REFERENCES TO RELATEDAPPLICATIONS Reference is made to commonly assigned copending U.S. Pat.applications Ser. No. 794,032 entitled AN AUTOMATIC CASSETTE LOADER ANDUNLOADER FOR SHEET FILM, filed concurrently herewith in the names ofPatricia M. Andrus and Charles J. Kunz, and serial No. 765,948 entitledFILM CASSETTE AND METHOD OF USE, filed Oct. 8, 1968 in the name ofNormal N. Lareau.

BACKGROUND OF THE INVENTION I. Field of the Invention This inventionrelates broadly to automatic cassette unloading and reloading machines,and more particularly to a magazine for supplying fresh sheet materialsuch as unexposed film to be reloaded into a cassette after removal ofthe exposed film.

2. Description of the Prior Art Various types of cassettes for sheetmaterial are known in the art. The present invention is primarilyintended for use in conjunction with cassettes adapted to receive asingle sheet of film such as X-ray film, to house the film duringphotographic exposure, to have the exposed film removed and to bereloaded with a fresh sheet of unexposed film. Such a cassette isdescribed in commonly assigned copending U.S. Pat. application Ser. No.765,948, entitled FILM CASSETTE AND METHOD OF USE, filed Oct. 8, 1968 inthe name of Norman N. Lareau. Although that application discloses aspecific type of cassette, it is referred to herein only as an example,many other types of cassettes being usable in conjunction with thepresent invention.

Machines for automatically unloading exposed film from a cassette of thetype described above and reloading that cassette with unexposed film arewell known in the art. One such machine is described in commonlyassigned copending U.S. Pat. application Ser. No. 794,032, entitled ANAUTOMATIC CASSETTE LOADER AND UNLOADER FOR SHEET FILM, filedconcurrently herewith in the names of Patricia M. Andrus and Charles .I.Kunz. In machines of this type, it is desirable, and the purpose of thepresent invention, to provide a supply of fresh film within the machineso that the cassettereloading process can be carried out automatically,the attention of the operator being needed only when the supply of freshfilm in the magazine has been exhausted. In these machines, it is apractice to provide the capability of handling various sizes ofcassettes and types of film or other sheet material. Therefore, themagazine must necessarily be capable of supplying film of varying sizeand type upon demand.

One such mechanism for performing this function is described in U.S.Pat. No. 3,150,263 to Kenneth K. Catlin. In this mechanism, cassettescontaining exposed film are fed into an unloading and reloading machinewhere they are opened and the exposed sheet of film is removed. Aplurality of horizontal magazines, one for each type and size of film,are carried in the machine above the cassette position and a series offilm guide chutes extend from positions adjacent each magazine to justabove the open cassette. A number of suction cups, one for eachmagazine, are pivotally mounted for movement between the magazines andthe guide chutes When a magazine corresponding to the size film to beloaded into the open cassette is opened, each of the suction cups islowered. Only that cup adjacent the open magazine will contact the film.After vacuum is applied to the cups, their movement is reversed and asheet of film from an open magazine is carried to a corresponding guidechute where it is released to travel down the chute to the waitingcassette. Each magazine is formed of a boxlike enclosure open at the endadjacent the suction cups and of a tray slidable therein. The tray isnormally held retracted in the box by springs. A spring closed door isprovided on the open side of the box and is pushed open by forwardmovement of the tray which is powered by a SUMMARY OF THE INVENTION Itisan object of the present invention to provide a cartridge havingimproved means for permitting removal of a single piece of sheetmaterial.

It is another object of the present invention to provide a magazine forsheet material having an improved means for presenting a piece ofmaterial for removal from the magazine.

It is still another object of the present invention to provide amagazine for sheet material having means to receive a plurality ofcartridges and having a mechanism for lifting a selected cartridge, thecartridges being openable automatically upon being raised.

In accordance with a preferred embodiment of the invention, a pluralityof cartridges are carried in a magazine in a side-by-side relationship.Although the nomenclature cartridge and cassette is sometime usedinterchangeably in the art, I have herein used cartridge to refer tothat part of the magazine of the present invention which carries thesheet material supply and cassette to refer to the device to be loadedwith sheet material'from the cartridge. Each cartridge has a side doorthrough which a supply of sheet material may be loaded and an accessdoor through which individual sheets may be removed. The access door isprovided with a shaft for cooperation with a mechanism on the magazinewhich automatically opens the access door when the cartridge is raised.To raise selected cartridges, a motor raises and lowers a lifting devicenormally independently of the cartridges. A cartridge which has beenselected to be raised is latched to the lifting device to be raisedtherewith.

The invention, and its objects and advantages, will become more apparentin the detailed description of the preferred embodiments presentedbelow.

BRIEF DESCRIPTION OF THE DRAWINGS In the detailed description of thepreferred embodiments of the invention presented below, reference ismade to the accompanying drawings, in which:

FIG. I is a front elevational view of the cartridge of the presentinvention;

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;

FIG. 3 is a sectional view showing the sheet material loading door inits closed position taken along line 3-3 of FIG. I;

FIG. 4 is a sectional view similar to FIG. 3 showing the sheet materialloading door in its open position;

FIG. 5 is a side elevational view partially in section of the magazineof the present invention;

FIG. 6 is a front elevational view partially in section of the magazineshown in FIG. 5;

FIG. 7 is a top view of the magazine shown in FIGS. 5 and 6;

FIG. 8 is an enlarged perspective view of the cartridge raising deviceof the present invention; and

FIG. 9 is a perspective view of an alternative embodiment showing thecartridge-opening mechanism.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The sheet material magazine tobe described herein is intended primarily for use in a cassetteunloading and loading machine as described in the above-mentionedapplication filed in the names of Patricia M. Andrus and Charles .I.Kunz. For that reason, detailed description of the unloader and loadermachine have been omitted for this application, and the reader isreferred to that application for details of the unloading and loadingmachine. The present description will be directed in particular toelements forming part of, or cooperating more directly with, themagazine forming the present invention.

Referring briefly to FIG. 5, the general components of the magazine areshown. In the central region of the magazine, a plurality of cartridges12 are held in an equal number of sheet metal carriers .14. Onecartridge 12 and its associated carrier 14' are shown in a raisedposition. A mechanism denoted generally by reference numeral is providedon the magazine frame to open the doors of the cartridges as thecartridges are raised. Details of this operation will be laterdescribed. Below carriers 14, a mechanism denoted generally by referencenumeral 22 is provided to raise selected cartridges and carriers.

Referring now to FIGS. l4, details of the individual cartridges 12 willbe explained. Each cartridge is formed generally in the shape of arectangular box having a front panel 24, a rear panel 26 and a pluralityof sidewalls 28. Front panel 24 carries lighttight door 30 pivotallymounted about hinge 32.

A pin 34 is mounted on door 30 by a bracket 36. Pin 34 extends above andto left of cartridge 12 as shown in FIG. 1 and is provided to cooperatewith door-opening device 20 of the magazine frame. FIG. 2 shows a crosssection of door 30 in its closed position and in its open position, thelatter being shown in phantom lines.

Door 30 is provided for removal of sheet material which has beenpreloaded into cartridge 12. Removal is preferably carried out by theprocess described in the above-noted, copending application. A seconddoor 38 is provided along one side of cartridge 12 for loading sheetmaterial into a cavity 40 defined by the front and rear panels and thesidewalls of the cartridge. Door 38 is pivotally carried by a hinge 42,and is held in the closed position shown in FIG. 3 by a clasp 44. FIG. 4shows the door in its open, sheet material receiving position.

Referring back to FIG. 5, a plurality of sheet metal carriers 14 aremounted for vertical movement within the magazine frame. Each carrier isformed in a generally U-shape as best seen in FIGS. 5 and 8. The frontor near side of the carriers as seen in FIG. 5 are left open to receivecartridges 12, a lip 46 being provided below the front opening of thecarriers to guide the cartridges into the carrier. Once in the carriers,cartridges 12 are locked in place by a bracket 45 (FIG. 6) which ispivotally mounted at 47 for movement between a lower position shown inphantom and a lock position resting on stud 49.

Each carrier 14 is mounted for vertical movement in the magazine frameand is guided by a pair of front guide rods 48 and a single rear guiderod 50. Guide rods 48 cooperate with channels 52 formed by any suitablemeans on carriers 14 such as welding angle iron to the outside of thecarriers. A roller 54 mounted on each carrier below lip 46 serves tolessen the frictional contact between the carrier and front guide rods48.

The rear of each carrier 14 is provided with upper and lower brackets 56and 58, respectfully. Each bracket carries a bearing member 60 forsliding movement along rear guide rods 50. Each lower bracket 58 isattached to one end of a coil spring 62, FIG. 6, which partially offsetsthe weight of the carrier and cartridge. As can be best seen in FIG. 6,carriers 14 are provided with extensions 64 to which lower brackets 58are secured.

As mentioned above, carriers 14 are mounted for vertical movement alongguide rods 48 and 50. The apparatus for lifting selected carriers andtheir associated cartridges is mounted in the lower region of themagazine. A horizontal shaft 66 is carried in the magazine frame. Aplurality of levers 68, one for each carrier, are pivotally mounted atone of their ends to shaft 66. The other end oflevers 68 are connectedto a second set of levers 70 of like number, levers 70 being attached toextensions 64 of carriers 14.

A plate 72 is also pivotally mounted at its ends about shaft 66 andextends above each lever 68. Plate 72 has atop portion 74 fastenedthereto and forming a space 76 through which a rod 78 extends. Rod 78 isconnected at one end to a lever 80 which is in turn pivotally mounted toa crank arm 82 carried by a rotatable shaft 84. Shaft 84 is powered by amotor 86. When crank arm 82 is in its lowered position shown in phantornlines in FIG. 5, plate 72 is rotated in a counterclockwise directionabout shaft 66 to the position shown in FIG. 8. Upon actuation of motor86, shaft 84 rotates through 180 to raise crank arm 82, lever and rod 78to the positions shown in FIG. 6.

Normally plate 72 is raised independently of levers 68. However, eachlever 68 carries a rotatably mounted catch 88 which is activated by asolenoid, not shown, to clamp the lever to plate 72. The solenoids areindependently operated so that a single lever 68 corresponding to thecartridge to be raised is clamped to plate 72 while the other levers 68are left free of plate 72. When one lever 68 has been clamped to plate72, rotation of shaft 84 through 180 will lift plate 72 and the lever 68clamped thereto, resulting in the raising of the corresponding carrier14 and cartridge 12. Rotation of shaft 84 through an additional 180 willlower the raised apparatus.

As a cartridge 12 is raised by the lifting mechanism previouslydescribed, its door 30 is automatically opened. The mechanism providedfor opening the door is shown at the top of the magazine frame. Achannel member 90 is mounted at the top left side of the magazine asseen in FIG. 6. This channel member carries a plurality of pivotallymounted pins 92 which are biased by springs 94 for rotation in clockwisedirection as viewed in FIG. 5. Each pin carries a finger 96 whichnormally extends to the right as shown in FIG. 5 and rests upon theadjacent'pin. The rightmost finger 96' rests upon an abutment 92' ratherthan a pin.

As a cartridge is raised, such as cartridge 12' in FIG. 5, its door pin34 engages one of the fingers 96. That finger rotates counterclockwiseabout its pin 92 against a biasing force of spring 94. Finger 96 travelsin a path which, in cooperation with pin 34, opens door 30 of cartridge12'. A piece of sheet material may now be removed from the cartridge andmotor 86 reactivated to lower the cartridge, the lowering motionautomatically closing door 30.

FIG. 9 shows a second embodiment of the cartridge door opening device.In the foreground of the drawing, a carrier 14 and its associatedcartridge are shown, like reference numerals being used to depict partscorresponding to those in the previous described embodiment. Thedoor-opening apparatus includes a cam plate 102 with a series of cutouts104 arranged to guide pins 34 of cartridges 12 so that doors 30 of thecartridgcs will be opened as the cartridges are raised. Only onecartridge is shown, and its pin 34 is shown mounted on door 30 by aslightly different bracket 36'. A lockout plate 106 is slidably carriedon a series of rivets 108 on cam plate 102. An electrical switch 110 isclosed when plate 106 is in the leftwardly position shown in FIG. 9.Switch 110 is electrically connected to a device 111 for signaling theoperator and for shutting down operation of the automatic unloader andloader machine. Normally, lockout plate 106 is held to the right by atension spring 112. However, should the mechanism for removing a pieceof sheet material from cartridge 12 malfunction and a piece of sheetmaterial remain partially extending from door 30 such as the piece shownas 114 in FIG. 9, door 30 will not close properly and pin 34 will beforced to the left. Pin 34 will carry lockout plate 106 leftwardly toclose switch 110, alerting the operator and shutting down machineoperation.

The invention has been described in detail with particular reference topreferred embodiments thereof, but it will be understood that variationsand modifications can be effected within the spirit and scope of theinvention.

We claim:

1. A cartridge for unexposed sensitized sheet material, said cartridgecomprising:

a. front and rear panels having peripheral edges;

6. four walls interconnecting said peripheral edges of said panels andforming a cavity therewith, one of said walls comprising a first doorhingably mounted to said front panel and openable to permit insertion ofa supply of sheet material into said cavity;

c. a second door in said front panel and openable to provide access tosaid cavity for removing the sheet material; and

d. means for establishing a lighttight seal about said first and seconddoors.

2. A cartridge as defined in claim 1 wherein said second door is mountedby hinge means to said front panel and carries a pin spaced from saidhinge means and extending beyond one of said peripheral edges foropening said second door.

3. A mechanism for' selectively raising any of a plurality of objects,said mechanism comprising:

a. a plurality of aligned carriers adapted to receive the objects;

b. a lifting device having a portion extending along said carriers andmovable between raised and lowered positions normally independent ofsaid carriers; and

c. means for selectively coupling individual ones of said car riers tosaid potion of the lifting device, whereby movement of said portion toits raised position effects movement of said individual onesof saidcarriers which are coupled to said lifting device.

4. A mechanism for selectively raising any of a plurality of objects,said mechanism comprising:

a. a plurality of carriers adapted to receive the objects;

b. a lifting device comprising:

1. a member extending below said carriers and having a portion movablein a substantially vertical direction towards and away from saidcarriers, and

2. means for raising and lowering said member; and

c. a latch associated with each of said carriers and movable between afirst position in which said member portion is movable independently ofthe carrier associated with the latch and a second position in which thecarrier associated with the latch is coupled to said member portion forvertical movement therewith.

5. A mechanism for selectively raising any of a objects, said mechanismcomprising:

a. a plurality of substantially vertically disposed guide tracks;

b. a plurality of carriers for receiving the objects, said carriershaving guide means associated with said tracks for confining saidcarriers to movement in a direction parallel to said tracks; and l c.means for raising only a selected one of said carriers.

plurality of 6. A mechanism for positioning an object, said mechanismcomprising:

a. a frame;

b. a plurality of parallel posts carried by said frame;

c. a carrier to receive the objects;

d. guide means carried by said carrier and cooperating with said poststo constrain said carrier to movement in a direction parallel to saidposts;

e. roller means carried by said carrier for limiting frictional contactbetween said posts and said guide means;

f. a device having a portion movable generally in said direction; and

g. means for selectively connecting said carrier to said portion forcausing said carrier to move therewith.

7. A mechanism for selectively raising any of a plurality of objects,said mechanism comprising:

a. a plurality of substantially vertically disposed guide tracks;

b. a plurality of carriers for receiving the objects, said carriershaving guide means for cooperating with said tracks to confine saidcarriers to movement in a direction parallel to said tracks;

c. a lifting device having a portion movable between raised and loweredpositions normally independent of said carriers; and

d. means for selectively coupling individual ones of said carriers tosaid lifting device portion, whereby movement of said lifting deviceportion to its raised position effects movement of said individual onesof said carriers which are coupled to said lifting device.

8. A mechanism for selectively raising any of a plurality of cartridgescontaining X-ray film and having a door openable to provide access tothe sheet material, said mechanism comprising:

a. a plurality of carriers into each of which one of the cartridges maybe inserted, each of said carriers having a raised position and alowered position;

b. a lifting device having a portion movable between raised and loweredpositions;

c. means cooperating with said lifting device portion for movingselected carriers between their raised and lowered positions; and

d. means responsive to movement of a carrier from its lowered to itsraised position for opening the cartridge door.

9. A magazine for sheet material, said magazine comprising: a. at leastone cartridge adapted to receive the sheet material, said cartridgehaving a raised and a lowered position;

b. a door in said cartridge;

c. means for moving said cartridge between said lowered and raisedpositions; and

d. means responsive to movement of said cartridge from its lowered toits raised position for opening said door.

10. A magazine comprising:

a. a fixed frame;

b. at least one cartridge carried by said frame for movement in firstand second opposite directions, said cartridge havmg:

1. a front wall which defines a plane, said directions of cartridgemovement being parallel to said plane;

2. a plurality of other walls which, together with said front wall,define a cavity;

3. a door in said front wall to provide access to said cavity andmovable in a direction away from said cavity about an axis of rotationperpendicular to said directions of cartridge movement to an openposition; and

0. means engageable with said door upon movement of said cartridge insaid first direction to move said door to its open position.

11. A magazine comprising:

a. a fixed frame;

b. at least one cartridge carried by said frame for movement in firstand second opposite directions, said cartridge having:

1. a front wall which defines a plane, said directions of cartridgemovement being parallel to said plane,

2. a plurality of other walls which, together with said front wall,define a cavity; and

3. a door in said front wall to provide access to said cavity andmovable in a direction from said cavity about an axis of rotationperpendicular to said directions of cartridge movement to an openposition; and

c. an arm pivotally connected to said frame .at a point spaced from saidplane and extending towards said plane, said arm having means to engageand open said door as said cartridge is moved in said first direction.

12. A magazine comprising:

a. a fixed frame;

b. at least one cartridge carried by said frame for movement in firstand second opposite directions, said cartridge having:

1. a front wall which defines a plane, said directions of cartridgemovement being parallel to said plane;

2. a plurality of other walls which, together with said front wall,define a cavity; and

3. a door in said front wall to provide access to said cavity andmovable in a direction away from said cavity about an axis of rotationperpendicular to said directions of cartridge movement to an openposition; and

c. a cam member mounted on said frame and engageable with said door assaid cartridge is moved in said first direction to pivot said door toits open position and to pivot said door to a closed position as saidcartridge is moved in said second direction.

13. A magazine as defined in claim 12 wherein said cam member includessignal means responsive to failure of said door to close completely assaid cartridge is moved in said second direction.

1. A cartridge for unexposed sensitized sheet material, said cartridgecomprising: a. front and rear panels having peripheral edges; b. fourwalls interconnecting said peripheral edges of said panels and forming acavity therewith, one of said walls comprising a first door hingablymounted to said front panel and openable to permit insertion of a supplyof sheet material into said cavity; c. a second door in said front paneland openable to provide access to said cavity for removing the sheetmaterial; and d. means for establishing a lighttight seal about saidfirst and second doors.
 2. A cartridge as defined in claim 1 whereinsaid second door is mounted by hinge means to said front panel andcarries a pin spaced from said hinge means and extending beyond one ofsaid peripheral edges for opening said second door.
 2. means for raisingand lowering said member; and c. a latch associated with each of saidcarriers and movable between a first position in which said memberportion is movable independently of the carrier associated with thelatch and a second position in which the carrier associated with thelatch is coupled to said member portion for vertical movement therewith.2. a plurality of other walls which, together with said front wall,define a cavity;
 2. a plurality of other walls which, together with saidfront wall, define a cavity; and
 2. a plurality of other walls which,together with said front wall, define a cavity; and
 3. a door in saidfront wall to provide access to said cavity and movable in a directionaway from said cavity about an axis of rotation perpendicular to saiddirections of cartridge movement to an open position; and c. a cammember mounted on Said frame and engageable with said door as saidcartridge is moved in said first direction to pivot said door to itsopen position and to pivot said door to a closed position as saidcartridge is moved in said second direction.
 3. a door in said frontwall to provide access to said cavity and movable in a direction fromsaid cavity about an axis of rotation perpendicular to said directionsof cartridge movement to an open position; and c. an arm pivotallyconnected to said frame at a point spaced from said plane and extendingtowards said plane, said arm having means to engage and open said dooras said cartridge is moved in said first direction.
 3. a door in saidfront wall to provide access to said cavity and movable in a directionaway from said cavity about an axis of rotation perpendicular to saiddirections of cartridge movement to an open position; and c. meansengageable with said door upon movement of said cartridge in said firstdirection to move said door to its open position.
 3. A mechanism forselectively raising any of a plurality of objects, said mechanismcomprising: a. a plurality of aligned carriers adapted to receive theobjects; b. a lifting device having a portion extending along saidcarriers and movable between raised and lowered positions normallyindependent of said carriers; and c. means for selectively couplingindividual ones of said carriers to said potion of the lifting device,whereby movement of said portion to its raised position effects movementof said individual ones of said carriers which are coupled to saidlifting device.
 4. A mechanism for selectively raising any of aplurality of objects, said mechanism comprising: a. a plurality ofcarriers adapted to receive the objects; b. a lifting device comprising:5. A mechanism for selectively raising any of a plurality of objects,said mechanism comprising: a. a plurality of substantially verticallydisposed guide tracks; b. a plurality of carriers for receiving theobjects, said carriers having guide means associated with said tracksfor confining said carriers to movement in a direction parallel to saidtracks; and c. means for raising only a selected one of said carriers.6. A mechanism for positioning an object, said mechanism comprising: a.a frame; b. a plurality of parallel posts carried by said frame; c. acarrier to receive the objects; d. guide means carried by said carrierand cooperating with said posts to constrain said carrier to movement ina direction parallel to said posts; e. roller means carried by saidcarrier for limiting frictional contact between said posts and saidguide means; f. a device having a portion movable generally in saiddirection; and g. means for selectively connecting said carrier to saidportion for causing said carrier to move therewith.
 7. A mechanism forselectively raising any of a plurality of objects, said mechanismcomprising: a. a plurality of substanTially vertically disposed guidetracks; b. a plurality of carriers for receiving the objects, saidcarriers having guide means for cooperating with said tracks to confinesaid carriers to movement in a direction parallel to said tracks; c. alifting device having a portion movable between raised and loweredpositions normally independent of said carriers; and d. means forselectively coupling individual ones of said carriers to said liftingdevice portion, whereby movement of said lifting device portion to itsraised position effects movement of said individual ones of saidcarriers which are coupled to said lifting device.
 8. A mechanism forselectively raising any of a plurality of cartridges containing X-rayfilm and having a door openable to provide access to the sheet material,said mechanism comprising: a. a plurality of carriers into each of whichone of the cartridges may be inserted, each of said carriers having araised position and a lowered position; b. a lifting device having aportion movable between raised and lowered positions; c. meanscooperating with said lifting device portion for moving selectedcarriers between their raised and lowered positions; and d. meansresponsive to movement of a carrier from its lowered to its raisedposition for opening the cartridge door.
 9. A magazine for sheetmaterial, said magazine comprising: a. at least one cartridge adapted toreceive the sheet material, said cartridge having a raised and a loweredposition; b. a door in said cartridge; c. means for moving saidcartridge between said lowered and raised positions; and d. meansresponsive to movement of said cartridge from its lowered to its raisedposition for opening said door.
 10. A magazine comprising: a. a fixedframe; b. at least one cartridge carried by said frame for movement infirst and second opposite directions, said cartridge having:
 11. Amagazine comprising: a. a fixed frame; b. at least one cartridge carriedby said frame for movement in first and second opposite directions, saidcartridge having:
 12. A magazine comprising: a. a fixed frame; b. atleast one cartridge carried by said frame for movement in first andsecond opposite directions, said cartridge having:
 13. A magazine asdefined in claim 12 wherein said cam member includes signal meansresponsive to failure of said door to close completely as said cartridgeis moved in said second direction.